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Publications du LPTA |  |
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Publications du LPTA | |
| HAL : hal-00421174, version 1 |
| arXiv : 0909.5634 |
| DOI : 10.1088/1742-5468/2010/01/P01019 |
| Fiche détaillée |  Récupérer au format |
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| Journal of Statistical Mechanics: Theory and Experiment 2010, 1 (2010) P01019 |
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| The thermal conductivity of alternating spin chains |
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| G. A. P. Ribeiro1Nicolas Crampe2A. Klümper3 |
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| (29/01/2010) |
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| We study a class of integrable alternating (S_1,S_2) quantum spin chains with critical ground state properties. Our main results are the derivation of a finite set of non-linear integral equations for the thermodynamical properties of the systems and the identification of the thermal currents as conserved currents. These results lead to explicit expressions of the thermal conductivities of the alternating spin chains. Numerical solutions to the integral equations are presented for specific cases of the spins S_1 and S_2.In the low-temperature limit a universal picture evolves where the thermal Drude weight is proportional to temperature T and central charge c. |
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| 1 : | universidad federal de sao carlos |
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| 2 : | LPTA - Laboratoire de Physique Théorique et Astroparticules |
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| 3 : | bergische universitat Wupperta |
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| Domaine | : | Physique/Matière Condensée/Mécanique statistique |
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| integrable spin chains (vertex models) – thermodynamic Bethe ansatz – quantum integrability (Bethe ansatz) |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/0909.5634 |
| hal-00421174, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00421174 | |
| oai:hal.archives-ouvertes.fr:hal-00421174 | |
| Contributeur : Logiciel Aigle | |
| Déposé pour le compte de : | |
| Soumis le : Jeudi 1 Octobre 2009, 09:57:19 | |
| Dernière modification le : Mardi 2 Mars 2010, 13:00:55 | |
